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| Titel |
Digital relief 3D model of the Khibiny massive (Kola peninsula) |
| VerfasserIn |
Elena Chesalova, Alex Asavin |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103645
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| Publikation (Nr.) |
 EGU/EGU2015-3058.pdf |
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| Zusammenfassung |
| On the basis of maps of 1: 50,000 and 1: 200,000 3D model Khibiny massif developed. We
used software ARC / INFO v10.2 ESRI. This project will be organised to build background
for gas pollution monitoring network. We planned to use the model to estimate local
heterogeneities in the composition of the atmosphere at the emanation of greenhouse gases in
the area, the construction of models of vertical distribution of the content of trace gases in the
rock mass.
In addition to the project GIS digital elevation model contains layers of geological and
tectonic map that allows us to estimate the area of the output of certain petrographic rock
groups characterized by different ratios of emitted hydrocarbons (CH4/ H2).
The model allows to construct a classification of fault in the array. At first glance, there
are two groups of faults - the ancient associated with the formation of the intrusive phases
sequence, and the young - due to recent tectonic shifts. Ancient faults form a common
semicircular structure of the pluton cause overall asymmetry Khibin heights with the
transition to the border area between the Khibiny and Lovoozero. Modern tectonics mainly
represented by radial and chord faults which are formed narrow mountain valleys and
troughs. It remains an open question as to which system fault (old or young) is more
productive to gas emanations? On the one hand the system characterized by a large old depth,
on the other hand a young more active faults. Address these issues require further detailed
observations.
The essential question is to assess the possibility of maintaining a constant concentration
gradient of these impurities in the atmosphere due to gas emanations of fracture zones and
areas enriched occluded gases. In the simulation of these processes can be used initially set
parameters:
1 the flow rate of the gas impurities
2 the value of wind flows in closed and open valley
3 Assessment of thermal diffusion coefficients determined by the temperature gradient at
the bottom and at the edge of the valley.
Changing these parameters for different climatic seasons allows us to estimate the
duration of the existence of gas in homogeneities in the aerial under soil and up soil layers.
Complex ring structure site and manifestations of recent tectonic movements allow it to
allocate more closed areas with different plant-land cover and different geomorphological
features. In particular stand out - bogs, forest area on the slopes and riparian forest zone, the
zone of mountain tundra and rocky plateau.
Designated areas should be considered together with the full history of the evolution relief
Khibin, processes of decrease glaciers and their occurrence. One of the results of
the work performed is the allocation within the array of closed circuses, paleo-ice
landforms drumlin and moraine ridges. These landforms represent the latest stage of the
glacial history of glaciation on the Kola Peninsula and the Arctic coast. Estimated
areal characteristics of different forms. In some cases it was possible to separate a
sequence of glacial relief forms, which suggests staging a retreat of glaciers in the
area.
The project highlighted areas open mining apatite ores in Khibiny massif. Career located
in the inner part of the massif form a closed area drain mine water pollution and wind. While
the new career located on the border of the array and the forest zone characterized by a single
watershed and accordingly included in the ecological life support cycle of residential villages
and towns of Kirovsk and Apatity. This fact forces us to view mining activity as a powerful
source of contamination.
Designed GIS project thus can be used to solve a number of problems geomorphological
orientation. In addition a number of application issues - the environment, paleoclimatology,
geotectonic can be successfully addressed on the basis of the digital 3D model. |
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